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Monthly climate in Yamaguchi, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Yamaguchi features a humid subtropical climate (Cfa).Temperatures typically range between 5 °C (42 °F) and 28 °C (83 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 1794 mm (70.6 inches) and receives 136 rainy days on the 1 mm (0.04 inches) threshold annually.Yamaguchi enjoys an average of 3078 hours of sunshine throughout the year, and daylight varies from 9 hours 54 minutes to 14 hours 22 minutes per day.

Monthly average temperatures in Yamaguchi, Japan §

The warmest months in Yamaguchi are July, August and September, with daily mean temperatures ranging from 24 to 28 °C (75 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 7 °C (42 - 46 °F) throughout the day. On average each year, Yamaguchi experiences 107 days above 25 °C (77.0 °F) and 13 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Yamaguchi, Japan.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 16°C
(60°F)		 22°C
(71°F)		 22°C
(72°F)		 26°C
(79°F)		 30°C
(87°F)		 31°C
(89°F)		 37°C
(99°F)		 38°C
(100°F)		 35°C
(95°F)		 30°C
(87°F)		 25°C
(78°F)		 21°C
(70°F)
Mean maximum 14°C
(58°F)		 16°C
(62°F)		 21°C
(70°F)		 25°C
(77°F)		 29°C
(84°F)		 30°C
(86°F)		 34°C
(94°F)		 36°C
(98°F)		 32°C
(91°F)		 28°C
(83°F)		 23°C
(73°F)		 17°C
(63°F)
Average high 9°C
(49°F)		 10°C
(50°F)		 15°C
(59°F)		 19°C
(67°F)		 24°C
(75°F)		 26°C
(80°F)		 30°C
(86°F)		 32°C
(90°F)		 28°C
(82°F)		 23°C
(74°F)		 17°C
(64°F)		 11°C
(52°F)
Daily mean 5°C
(42°F)		 6°C
(43°F)		 10°C
(51°F)		 14°C
(58°F)		 19°C
(67°F)		 22°C
(73°F)		 26°C
(80°F)		 28°C
(83°F)		 24°C
(75°F)		 19°C
(66°F)		 13°C
(55°F)		 7°C
(46°F)
Average low 2°C
(36°F)		 2°C
(37°F)		 6°C
(43°F)		 10°C
(50°F)		 14°C
(58°F)		 19°C
(66°F)		 23°C
(74°F)		 25°C
(77°F)		 21°C
(69°F)		 15°C
(59°F)		 8°C
(47°F)		 4°C
(39°F)
Mean minimum -2°C
(29°F)		 -2°C
(29°F)		 0°C
(33°F)		 2°C
(37°F)		 8°C
(46°F)		 14°C
(57°F)		 20°C
(68°F)		 21°C
(69°F)		 15°C
(59°F)		 8°C
(47°F)		 2°C
(36°F)		 -0°C
(31°F)
Minimum -4°C
(25°F)		 -3°C
(27°F)		 -1°C
(31°F)		 1°C
(34°F)		 5°C
(42°F)		 12°C
(54°F)		 17°C
(63°F)		 19°C
(66°F)		 13°C
(56°F)		 8°C
(46°F)		 -0°C
(32°F)		 -1°C
(31°F)

Compare climate in Yamaguchi with other places

Compare temperature, precipitation, sunshine, UV index in Yamaguchi, Japan with other places around the world.

Monthly average precipitation in Yamaguchi, Japan §

Yamaguchi usually has the most precipitation in July, August and September, with an average of 16 rainy days and 281 mm (11.1 inches) of precipitation per month.The driest months in Yamaguchi are January, November and December. On average, 55 mm (2.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Yamaguchi, Japan.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 58 (2.3) 78 (3.1) 130 (5.1) 122 (4.8) 136 (5.4) 198 (7.8) 340 (13.4) 265 (10.4) 240 (9.4) 120 (4.7) 41 (1.6) 67 (2.6)
Average precipitation days (≥ 1 mm) 9 9 12 10 11 13 20 15 14 10 5 8

Monthly sunshine hours in Yamaguchi, Japan §

The sunniest months in Yamaguchi are May, June and August, when the sun shines an average of 9 hours 42 minutes a day.Least sunny months in Yamaguchi: January, February and December receive an average of 6 hours 44 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Yamaguchi, Japan.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 173 229 263 279 300 290 279 303 256 256 233 211
Mean daily daylight hours 10h 8m 10h 56m 11h 58m 13h 2m 13h 56m 14h 22m 14h 9m 13h 22m 12h 21m 11h 18m 10h 22m 9h 54m

Solar UV radiation in Yamaguchi, Japan §

Yamaguchi experiences the highest level of ultraviolet (UV) radiation in April, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure.January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Yamaguchi UV Index data.

Average daily maximum UV levels by month for Yamaguchi, Japan.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 4 5 8 11 11 11 12 12 10 7 6 3